| /* |
| * Copyright 2013 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Ben Skeggs <bskeggs@redhat.com> |
| */ |
| |
| #include <subdev/bios.h> |
| #include "priv.h" |
| |
| int |
| nouveau_gddr5_calc(struct nouveau_ram *ram) |
| { |
| struct nouveau_bios *bios = nouveau_bios(ram); |
| int pd, lf, xd, vh, vr, vo; |
| int WL, CL, WR, at, dt, ds; |
| int rq = ram->freq < 1000000; /* XXX */ |
| |
| switch (!!ram->ramcfg.data * ram->ramcfg.version) { |
| case 0x11: |
| pd = (nv_ro08(bios, ram->ramcfg.data + 0x01) & 0x80) >> 7; |
| lf = (nv_ro08(bios, ram->ramcfg.data + 0x01) & 0x40) >> 6; |
| xd = !(nv_ro08(bios, ram->ramcfg.data + 0x01) & 0x20); |
| vh = (nv_ro08(bios, ram->ramcfg.data + 0x02) & 0x10) >> 4; |
| vr = (nv_ro08(bios, ram->ramcfg.data + 0x02) & 0x04) >> 2; |
| vo = nv_ro08(bios, ram->ramcfg.data + 0x06) & 0xff; |
| break; |
| default: |
| return -ENOSYS; |
| } |
| |
| switch (!!ram->timing.data * ram->timing.version) { |
| case 0x20: |
| WL = (nv_ro16(bios, ram->timing.data + 0x04) & 0x0f80) >> 7; |
| CL = nv_ro08(bios, ram->timing.data + 0x04) & 0x1f; |
| WR = nv_ro08(bios, ram->timing.data + 0x0a) & 0x7f; |
| at = (nv_ro08(bios, ram->timing.data + 0x2e) & 0xc0) >> 6; |
| dt = nv_ro08(bios, ram->timing.data + 0x2e) & 0x03; |
| ds = nv_ro08(bios, ram->timing.data + 0x2f) & 0x03; |
| break; |
| default: |
| return -ENOSYS; |
| } |
| |
| if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35) |
| return -EINVAL; |
| CL -= 5; |
| WR -= 4; |
| |
| ram->mr[0] &= ~0xf7f; |
| ram->mr[0] |= (WR & 0x0f) << 8; |
| ram->mr[0] |= (CL & 0x0f) << 3; |
| ram->mr[0] |= (WL & 0x07) << 0; |
| |
| ram->mr[1] &= ~0x0bf; |
| ram->mr[1] |= (xd & 0x01) << 7; |
| ram->mr[1] |= (at & 0x03) << 4; |
| ram->mr[1] |= (dt & 0x03) << 2; |
| ram->mr[1] |= (ds & 0x03) << 0; |
| |
| ram->mr[3] &= ~0x020; |
| ram->mr[3] |= (rq & 0x01) << 5; |
| |
| if (!vo) |
| vo = (ram->mr[6] & 0xff0) >> 4; |
| if (ram->mr[6] & 0x001) |
| pd = 1; /* binary driver does this.. bug? */ |
| ram->mr[6] &= ~0xff1; |
| ram->mr[6] |= (vo & 0xff) << 4; |
| ram->mr[6] |= (pd & 0x01) << 0; |
| |
| if (!(ram->mr[7] & 0x100)) |
| vr = 0; /* binary driver does this.. bug? */ |
| ram->mr[7] &= ~0x188; |
| ram->mr[7] |= (vr & 0x01) << 8; |
| ram->mr[7] |= (vh & 0x01) << 7; |
| ram->mr[7] |= (lf & 0x01) << 3; |
| return 0; |
| } |